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EUVD-2026-322449

fkie_cve-2026-44473

Ella Core is a 5G core designed for private networks. Prior to 1.10.0, a radio with a valid NG Setup can send a forged PDUSessionResourceSetupResponse carrying any UE's AMF-UE-NGAP-ID. Ella Core does not verify the message arrived on the SCTP association bound to that UE's logical NG-connection, then creates a GTP tunnel towards that radio. This vulnerability is fixed in 1.10.0.

GHSA-qfxw-v8qx-vj3v — Ella Core Vulnerable to UE Downlink Redirection via Forged PDUSessionResourceSetupResponse

Affected: Go: github.com/ellanetworks/core

## Summary

A radio with a valid NG Setup can send a forged PDUSessionResourceSetupResponse carrying any UE's AMF-UE-NGAP-ID. Ella Core does not verify the message arrived on the SCTP association bound to that UE's logical NG-connection, then creates a GTP tunnel towards that radio.

## Impact

Downlink user-plane traffic for the targeted UE is redirected to the attacker's radio.

## Fix

UE context lookups are now scoped to the sending radio's SCTP association.